Junction-box coupling.



E. vRRELL.

JUNCTION EUX G'OUPLNG APPLmATloE FILED JULY 2.1, 190s.

Aga/mmm n'iiiiiuins, iiioliuiiiiit, or PHILADELPHIA, rnmsrtimiiiii.

iunorroimnox cour-Liuc.

lt is the object ot niy invention to provide' an improved coupling oi attaching pipeA conduits to outlet or junction boxes which shall be low in cost and capable of easy and quick installation or application.

To this end, iny invention comprises the parts hereinafter described and claimed, which permit the Coupling of a pipe conduit to a junction or outlet box without requiring or resorting to screw threads upon either the junction box or the conduit pipe.

For an illustration of one of the forms my invention niay take, ,referenceis Vto be had to the accompanying drawing, in which:

Figui-e i is a top plan view, partly in sec tion, ol s junction or outlet box, the conduit pipe and coupling being shown in horizontal :i: section. llig. 2 is a side elevation of a junction or outlet box, art ot the box being shown in section. with the conduit pi e and coupling in elevation., Fig. 3 is a sin e View ot the coupling nip le.

A junction or out et box l of iiny suitable standard or other type, and oi any suitable shape, here shown circular by way ot exam iile,!li.as a plurality of openings 2 to receive conduit pipes 'll'ic conduit pipe 3, shown in section billig. l and in elevation in has placed. over the ond thereof the nipple e havingv e hexagonal, octegonal, or other shaped head, and a screw threiidcd shrink preferably tapering, provided with one or more longitudinal il or other shaped slits G. ,llflgiis nipple tits over the outside ol he conduit pipe le. and when so slipped over l .e con duit pipo, with the end of the shank. 5 ractically even wi h the end ot the conduit i' t I, the sanne introduced through one openings 2 in a well of the junction or fbox l, the opening being large enough to let the screw threaded shank 5 ofthe ni i-lple e, si, freely through. '.lllieii, irornt e inside olI t ic box l the nut is tlneaded on to the shank 5 of the nipple e, and, as it ad- Specification of Letters Patent.

.lipplication filed 31115124, 1908.

Patenten April S, 190th Serial No. 245,090.

Vances, it forces the sections of the shank 5, radially yielding or resilient because ol' the slits yor slots 6, iirinly against and entirely around. the outside ot the conduit pipe 3 thus lirinly clamping the nipple to the conduit pipe 3 and eventually clamping the wit-ll ol" the box l lirinly' between the shouldfc-:r oi the nipple l and the end of the nut '7. The nut 7 has a hexagonal, octegonal, or other shaped head for receiving a wrench or other suitable, driving means. As here shown, the opening through the head ol.' the nut 7 is`ot the .saine diameter as the internal diameter ot thc/ron-A duit pipe 3 und a curved fillet- 8 is provided so that when wires' arc drawn through the conduit pipe and nut 7 there will be no sharp edge to tear or abrade the insulation or covering on the wires.

By the construction above described, neither the junction or outlet box nor the conduit pipe need be screw threaded, and the nipple is 'lirnily clamped to the conduit pipe by the advance of the nut, and ai'tcr thus being lirmly clamped to the conduit pipe itA acts as an integral partei the conduit pipe t0 provide a shoulder between which andthe nut the wall of the junction or outlet boxis firmly clamped, thus forming e fni'n connection between the conduit pipe and box,

Vlfhile the nut 7 is hueie shown iis applied from the inside ol' the box, .it is to be understood that thc nut and nipple niaybe reversed, and the nut applied trom the outside of the box, the nut, ni suoli case, having an `internal diameter sufficient to pass over theA outside ot' the conduit pipo 3.

By the arriingeinent lierciii described, the nipple has no relative movement, either longitudinal or rotary, with. respect to the conduit pipe 3, but, as the nut advanced, n'ioie and more lirinly rlziinped '1o the conduit pipe.

As here shown, the junction or outlet box is circuler in loriii and il' ol drawn metal, 1the parts will Hatten the side ol' the box, indin cated in' the dra-wings, and clamp the saine where flattened between the nut and the nipple. lt to be understood, ol' course, that other types and shape.; ot boxes muy be used "with equal advantage and may bc unido ol' drawn or other nietal, or other iiiateriiil,

T he nipple and the nut 17 niay bc iliade ol' any suitable material, such :is malleable iron A castings, brass, etc. The construction is exceedingly cheap 'lor that the nuts and nipples may be cest, and by simple operationscrew l (lll iio I box being clamped between seid nipple and threaded, the slits or slots 7 being cored, if desired, and not requiring seperate mecbining or YInfini uletion. The nuts and nippies may be ma( e in quantities and used b 'the Wiren'ien when assembling the boxes en conduit pipes 3 the box and conduit pipe, as heretofore pointed out,'requiring` no. screw thread-l ing or other treatment orinnchining.

What .i claim is:

-l. The combination with a non-threaded junction box, of s non-threaded conduit pipe, and e. cou ling for attaching seid conduit pi e to sei box comprising o nut and e radi a y resilient nipple, seid nipple surrounding said non-threaded conduit pipe end adopted to be clamped toseid conduit pipe by tbe ed vence oiI seid nut upon seid nipple, end seid box clamped between said nipple and nut.

2., .T he combination with e non-threzided junction box, o i' e nonethreeded conduit pipe, and e,. eenling for ettucbing said conduit pipe to seid) box comprising o nut and a nipple', seid nipple being interiorly smooth to re ceive'said non-threaded conduit pipe :ind resilient und screw threaded to receive said nut, und adapted to be clamped to seid conduit pipe by the advance ci' said nut, seid nut.

l 1 l i i 1 l e insee 3. The combination with e junction box E adapted to advance upon tbe screw threads 5 ci' sind nipple to clamp seid nipple to seid conduit pipe end to clamp said box between itsell` `and seid nipple siiouider.

4i, A coupling for attaching non-threaded conduit pipes to junction boxes comprising e shouldered radially resilient exteriorly screwthreeded and interiorly smooth nipple, and :i .n ut adapted to advance upon the screw threads ol seid nipple to clamp the seine to 1 the exterior oienon-threeded conduit pipe and adapted to secure a the nipple shonider.A

In testimony whereof i affixed my signetnre in the presence of the two subscribing Witnesses.

MRRELL junction box ege-inst EDWARD S.

"iivitnesses:

An im E. STEINBOK, ,Unsinn Winnsrnn, Jr.

have hereunto 

